codal_app/microbithal_microphone: Add func to set the sensitivity.

Signed-off-by: Damien George <damien@micropython.org>

Author: dpgeorge

src/codal_app/microbithal.h

@@ -154,6 +154,7 @@ int microbit_hal_compass_get_field_strength(void);
 int microbit_hal_compass_get_heading(void);
 
 void microbit_hal_microphone_init(void);
+void microbit_hal_microphone_set_sensitivity(float value);
 void microbit_hal_microphone_set_threshold(int kind, int value);
 int microbit_hal_microphone_get_level(void);
 void microbit_hal_microphone_start_recording(uint8_t *buf, size_t max_len, size_t *cur_len, int rate);

src/codal_app/microbithal_microphone.cpp

@@ -99,6 +99,10 @@ void microbit_hal_microphone_init(void) {
     }
 }
 
+void microbit_hal_microphone_set_sensitivity(float value) {
+    uBit.audio.processor->setGain(value);
+}
+
 void microbit_hal_microphone_set_threshold(int kind, int value) {
     if (kind == MICROBIT_HAL_MICROPHONE_SET_THRESHOLD_LOW) {
         uBit.audio.levelSPL->setLowThreshold(value);